Valve

ABSTRACT

A valve in which a piston plug moving through a cylinder engages a seal at one end of the cylinder to prevent the flow of fluid therethrough. The opposite end of the piston is also sealed to the cylinder to prevent leakage. A cylindrical sleeve is sealed into the valve body and has an enlarged piston mounted for sealed reciprocation therein and forming part of the piston valve. Pneumatic or hydraulic pressure applied to opposite sides of the piston reciprocating in the sleeve cylinder will cause the piston valve to reciprocate to open and closed positions. In the modified form of the invention pressure is applied to one end of the reciprocating piston and a spring is provided for its return. In a further modified form of the invention a connecting rod is coupled to the piston for hand operation of the valve. All working parts of the valve can be removed for repair without disconnecting the valve body from the line.

ited' States Patent [191 Yauneridge Dec. 11, 1973 VALVE [76] Inventor:Raymond Yauneridge, 605 Cherry St., Windber, Pa. 15963 22 Filed: Jan.27, 1972 2 1 Appl. No.: 221,331

[52] US. Cl 251/14, 251/31, 251/63 [51] Int. Cl. F16k 31/143, Fl6k 1/00[58] Field of Search 251/63, 25, 31

[56] References Cited I UNITED STATES PATENTS 1,960,284 5/1934 White251/63 X 1,999,493 4/1935 White 251/63 2,701,704 2/1955 Lawrence 251/63X 3,004,552 10/1961 Shafer 251/63 X 3,426,998 2/1969 Kintner 251/63 X3,664,305 5/1972 Hart et a1 "119/72 Primary Examiner-Arnold RosenthalAttorneyElton H. Brown et a1.

[57] ABSTRACT A valve in which a piston plug moving through a cylinderengages a seal at one end of the cylinder to prevent the flow of fluidtherethrough. The opposite end of the piston is also sealed to thecylinder to prevent leakage. A cylindrical sleeve is sealed into thevalve body and has an enlarged piston mounted for sealed reciprocationtherein and forming part of the piston valve.- Pneumatic or hydraulicpressure applied to opposite sides of the piston reciprocating in thesleeve cylinder will cause the piston valve to reciprocate to open andclosed positions. In the modified form of the invention pressure isapplied to one end of the reciprocating piston and a spring is providedfor its return. In a further modified form of the invention a connectingrod is coupled to the piston for hand operation of the valve. Allworking parts of the valve can be removed for repair withoutdisconnecting the valve body from the line.

7 Claims, 6 Drawing Figures PATENIEI] DEB I 1 I973 sum 2 or 2 AA AAA i/as.

VALVE BACKGROUND OF THE INVENTION 1. Field of the Invention The presentinvention relates to piston valves and particularly to piston valveswhich seal at both ends of the piston travel.

2. Summary of the Invention A cylindrical valve body is provided withpipe flanges on opposite sides thereof for connecting into a line withthe opposite ends of the cylindrical body having removable caps topermit assembly and disassembly of the valve. A smaller cylinder axiallypositioned within the cylindrical body is connected to one of the linecouplers on one side thereof so that the pipe flow will be through theside of the smaller 'cylinderand out one end thereof before flowingthroughthe other coupling into the pipeline. A piston plug is slidablymounted in the smaller cylinder for engagement with a seal at the outletend to seal off the flow through the valve. The opposite end of thepiston plug is sealed to prevent leakage as it reciprocates. Acylindrical sleeve is mounted in the valve body and has a pistonslidably mounted therein with this piston connected to the piston plug.Pressure is applied to opposite sides of the latter piston to cause itto reciprocate.

In a modified form of the invention pressure is applied to one side anda spring is used for the return. In another modified form of theinvention a rod is connected to the piston plug to permit it to bereciprocated by hand.

The primary object of the invention is to provide a valve in which allworking parts and wear surfaces can be removed from the valve bodywithout disconnecting the valve body from the line being controlled.

Other objects and advantages will become apparent in the followingspecification when considered in the lightof the attached drawings:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of theinvention;

FIG. 2 is an enlarged vertical sectional view taken along the line 22 ofFIG. 1 looking in the direction of the arrows;

FIG. 3 is a horizontal sectional view taken along the line 3-3 of FIG.2, looking in the direction of the arrows;

FIG. 4 is a view similar to FIG. 2, showing the valve in open position;

Flg. 5 is a fragmentary sectional view similar to FIG. 2, illustrating amodified form of the invention; and

FIG. 6 is a view similar to FIG. 5, illustrating another modified formof the invention.

Referring now to the drawings in detail wherein like referencecharacters indicate like parts throughout the several Figures, thereference numeral 10 indicates generally a valve constructed inaccordance with the invention.

The valve 10 includes a cylindrical body 11 having an annular groove 12formed in its outer surface adjacent the upper end 13 thereof. Anannular groove 14 is formed in the outer surface of the cylindrical body11 adjacent its lower end 15. A circular end cap 16 is secured againstthe upper end 13 of the body 11 by means of a split clamp ring 17 andseal 18.

A circular cap plate 19 is secured to the lower end of the body 11 bymeans of a split clamp ring 20 and seal 21. The clamp ring 17 engages inthe annular groove 12, and the clamp ring 20 engages in the annulargroove 14, as can be clearly seen in FIG. 2. The cap plate 19 has anannular threaded bore 22 extending therethrough.

A pipe flange 23 is secured to one side of the body 11 by means of anipple 24 and communicates with the interior'of the body 11. A secondpipe flange 25 is axially aligned with the pipe flange 23 and is mountedon a nipple 26 which extends through and is welded to the body 11 at 27.A valve seat cylinder 28 is axially aligned with the body l1 and isarranged between the pipe flanges 25,23. The nipple 26 has its inner endconnected tothe valve seat cylinder 28 communicating with the interiorthereof.

The upper end 29 of the valve seat cylinder. 28 has an internallyreduced diameter portion 30 with a sealing groove 31 extending annularlythereabout. An O-ring seal 32 is seated in the annular sealing groove 31for reasons to be assigned.

A cylindrical sleeve 33 is positioned in the cylindrical body 11 and hasannular sealing grooves 34,35 adjacent its upper and'lower ends,respectively..O-rings 36,37 are mounted in the sealing grooves 34,35 andare adapted to engage the inner surface of the cylindrical body 11 toseal the cylindrical sleeve 33 thereto.

A generally cylindrical collar 38 is secured to the sleeve 33 by welding39. The collar 38 has a large axial bore 40 extending downwardly thereinwith an annular groove 41 extending thereabout. A sealing O-ring 42 isseated in the groove 41 for sealing engagement with the outer face ofthe lower end of the valve seat cylinder 28.

An axial bore 43 communicates with the lower end of the axial bore 40and opens through the lower end of the collar 38. An annular groove 44is formed in the bore 43 to receive a sealing O-ring 45 seated therein.

An elongate cylindrical valve piston 46 is mounted for reciprocation inthe valve seat cylinder 28 and is adapted for sealing engagement withthe O-ring 32 when at its uppermost point. The piston 46 has sealingengagementwith the O-ring 45 at all times during its operation.

a piston head 47 is integrally formed with the piston 46 and has adiameter slightly smaller than the cylindrical sleeve 33. Annularsealing grooves 48 are formed in the piston head 47 and a pair of O-ringseals 49 are seated therein for sealing the piston head 47 against thesleeve 33. The piston valve 46 and the piston head 47 are connected by acylindrical portion 50 having a diameter slightly greater than thepiston valve 46 and smaller than the piston head 47.

The cylindrical portion 50 is adapted to engage the collar 38 to preventthe piston head 47 from coming into contact therewith.

A threaded bore 51 opens through the bore 11 and the cylindrical sleeve33, closely adjacent the collar 38, to permit a pneumatic or hydraulichose 52 to be connected thereto. A second hydraulic or pneumatic hose 53is connected to the threaded bore 22 in the end cap 19.

In the use and operation of the invention the flanges 23,25 areconventionally connected into a pipeline so that the cylindrical body 11extends transversely thereacross. Hydraulic or pneumatic pressuresupplied through the hose 52 will force the piston head 47 downwardly inthe cylindrical sleeve 33 to move the valve piston 46 downwardly andpermit a flow through the nipple 26 into the cylinder 28 and out the topinto the cylinder 11 and thence into the nipple 24 and back to thepipeline. When it is desired to close the valve, pressure is appliedthrough the hose 53 and forces the piston head 47 upwardly in the sleeve33 so that the piston valve 46 moves upwardly and engages the O-ringseal 32 to prevent the flow of fluid thereby. The O-ring seal 45prevents leakage past the piston 46 downwardly through the collar 38.

With the flow of fluid from left to right, as viewed in FIG. 2, there isno pressure on the valve piston 46 in a direction to open the valve whenit is in closed position and hence, it is not necessary to maintain anoperating pressure on the hose 53.

A threaded bore 54 extends axially into the lower end of the piston head47 to receive an operating rod 55 which is adapted to be threadedtherein.

In the event that it is necessary to actuate the valve during a periodin which neither pneumatic nor hydraulic pressure is available, thehoses 52 and 53 can be disconnected and a rod 55 inserted through thethreaded bore 22 and threaded into the threaded bore 54 to be grasped byhand to move the valve as desired.

In FIG. 6 a modified form of the invention is illustrated wherein an endcap 19' is secured to the lower end of the body 11 by means of the splitclamp 20. A vent bore 22 extends through the cap 19 for reasons to beassigned. A coil spring 53' is positioned within the cylindrical sleeve33 engaging at one end the end cap 19' and the other end the piston head47.

In the use and operation of the invention as modified in FIG. 6, apneumatic or hydraulic hose is connected to the threaded bores 51 tosupply pressure to the top of the piston head 47 so as to compress thespring 53 as the piston head 47 moves downwardly in the sleeve 33. Thevent 22' permits air to flow to the space below the piston head 47 toprevent the locking up of the piston head 47. Since the piston valve 46is in closed position with the piston head 47 at its uppermost point itcan be clearly seen that shoiild the pneumatic or hydraulic pressurefail, the spring 53 will maintain the valve 46 in closed position.

Having thus described the preferred embodiments of the invention, itshould be understood that numerous structural modifications andadaptations may be resorted to without departing from the spirit of theinvention.

I claim:

l. A line valve including a generally cylindrical body, means onopposite sides of said body for connecting said body into a line to becontrolled, a cylinder having a diameter substantially less than that ofsaid body mounted axially within said body and communicating with themeans on one side of said body for connecting said body to a line, saidcylinder having an internally reduced diameter portion at its upper endwith an inwardly opening annular groove formed in said portion, a pistonvalve slidably mounted in said cylinder, said piston valve having adiameter substantially less than the diameter of said cylinder and lessthan the diameter of said portion, means in said groove for sealing theupper end of said piston valve to said portion, means at the lower endof said cylinder for sealing said piston valve thereto, a piston headsecured to said piston valve and having a diameter substantially largerthan the diameter of said piston valve, a sleeve mounted in said bodywith said piston head arranged for reciprocation therein, means formoving said piston head in said sleeve to Open and close said pistonvalve with respect to the upper sealed end of said cylinder, an end capdetachably secured to the upper end of said body to close said body andprovide access for replacement of said means for sealing the upper endof said piston valve without removal of said piston valve from saidvalve, and an end cap detachably secured to the lower end of said bodYto close said body and provide access for servicing said piston valveand said sleeve.

2. A device as claimed in claim 1, wherein said sleeve is sealed to saidbody and can be removed from said body with said end cap detached.

3. A device as claimed in claim 1, wherein the means for moving saidpiston in said sleeve includes hoses for connecting the space at theopposite ends 0F said piston head with a source of fluid under pressure.

4. A device as claimed in claim 1, wherein the means for moving saidpiston head in said sleeve includes a hose connecting the space at oneend of said piston head with a source of fluid under pressure, and acoil spring engaging the opposite face of said piston head to move saidpiston head and said piston valve in the opposite direction.

5. A device as claimed in claim 1, in which the means for moving saidpiston head in said sleeve includes a hand operated rod detachablysecured to said piston head and extending outwardly of said body.

6. A deVice as claimed in claim 1, wherein the means sealing the lowerend of said piston valve includes a collar secured to the upper end ofsaid sleeve and having a seal mounted in said collar.

7. A valve as claimed in claim 1, wherein said cylinder and said meanson one side of said body for connecting said body to a line andcommunicating with said cylinder are integrally formed as a tee.

1. A line valve including a generally cylindrical body, means onopposite sides of said body for connecting said body into a line to becontrolled, a cylinder having a diameter substantially less than that ofsaid body mounted axially within said body and communicating with themeans on one side of said body for connecting said body to a line, saidcylinder having an internally reduced diameter portion at its upper endwith an inwardly opening annular groove formed in said portion, a pistonvalve slidably mounted in said cylinder, said piston valve having adiameter substantially less than the diameter of said cylinder and lessthan the diameter of said portion, means in said groove for sealing theupper end of said piston valve to said portion, means at the lower endof said cylinder for sealing said piston valve thereto, a piston headsecured to said piston valve and having a diameter substantially largerthan the diameter of said piston valve, a sleeve mounted in said bodywith said piston head arranged for reciprocation therein, means formoving said piston head in said sleeve to Open and close said pistonvalve with respect to the upper sealed end of said cylinder, an end capdetachably secured to the upper end of said body to close said body andprovide access for replacement of said means for sealing the upper endof said piston valve without removal of said piston valve from saidvalve, and an end cap detachably secured to the lower end of said bodYto close said body and provide access for serviciNg said piston valveand said sleeve.
 2. A device as claimed in claim 1, wherein said sleeveis sealed to said body and can be removed from said body with said endcap detached.
 3. A device as claimed in claim 1, wherein the means formoving said piston in said sleeve includes hoses for connecting thespace at the opposite ends oF said piston head with a source of fluidunder pressure.
 4. A device as claimed in claim 1, wherein the means formoving said piston head in said sleeve includes a hose connecting thespace at one end of said piston head with a source of fluid underpressure, and a coil spring engaging the opposite face of said pistonhead to move said piston head and said piston valve in the oppositedirection.
 5. A device as claimed in claim 1, in which the means formoving said piston head in said sleeve includes a hand operated roddetachably secured to said piston head and extending outwardly of saidbody.
 6. A deVice as claimed in claim 1, wherein the means sealing thelower end of said piston valve includes a collar secured to the upperend of said sleeve and having a seal mounted in said collar.
 7. A valveas claimed in claim 1, wherein said cylinder and said means on one sideof said body for connecting said body to a line and communicating withsaid cylinder are integrally formed as a tee.